The rhino horns were found in luggage sent from Ethiopia to Thailand. Two Thai women who travelled from Vietnam and Cambodia to pick up the luggage ran off when it was subject to a random check, police said. Warrants are now out for their arrest.

Global trade in rhino horn is banned by a UN convention, but in some fast-growing Asian countries it is prized as an ingredient in traditional medicines to treat everything from fever to cancer.

It is estimated that only some 29,000 rhinos are left in the wild today compared to 500,000 at the start of the 20th century, according to the International Rhino Foundation.

Africa is home to 80 percent of the world's remaining rhinos.

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